The problem is odd: Suddenly Windows fails to start normally or goes into an infinite loop into the Automatic Repair mode and trying to fix the startup problems without success. Furthermore, any other effort to fix the Windows start-up problem, by using the System Restore, Refresh, Start-up repair, Go back to previous build options fails.

The Windows start-up problems are commonly caused by corrupted system or registry files and they often occur after the installation of a program or a Windows update.

This tutorial contains detailed instructions on how to fix Startup problems on Windows 10 or Windows 8 OS.

How to fix Windows Fails to Start, Fails to Repair or Fails to Restore issues in Windows 10, 8 & 7 OS.

Important: Before proceeding to fix Windows Startup problems, by following the instructions on the methods below, try the following procedure:

1. Disconnect everything of your computer, including the power cord. If you 're using a laptop, also remove the battery.
2. With everything disconnected, press and hold down the Power button, for about 15-20 seconds.
3. Put back the Power cord and connect only any other device needed (e.g. Keyboard, Mouse, Monitor). Leave disconnected any other USB device that isn't needed to boot. (USB Storage devices, USB printers, etc.)
4. Power On your computer.
5. Get in BIOS and ensure that the main Hard Drive (the one with the OS), is the first boot device in Boot Priority list (and not the "Windows Boot Manager").
6. Save and exit BIOS.
7. Reboot your computer.
8. If Windows fails to start again, first try to run a system restore or to fix Start-up problems by using the Windows Troubleshooting options if available. If everything fails, then proceed to the methods below. *

* Note: All the methods below require to access Command Prompt. If you 're unable to access command prompt, during Windows boot, then:

* Note:If you have started your computer from the Windows installation media, then you 'll receive the following error after giving the SFC / SCANNOW" command: "There is a system repair pending which requires reboot to complete. Restart Windows and run SFC again". To bypass the error you have to run the SFC command offline: **

* Note: If after the restart, your PC doesn't start, with the error "The operating system couldn't be loaded because the system registry file(s) is missing or contains errors", (see screenshot below), then boot from a Windows installation media, launch command prompt and restore the original registry files from the "backupold" folder, by giving the following commands in order:

cd \windows\system32\config\backupold

copy *.* ..

(Type exit and press Enter to close command prompt and then reboot your computer).

– Notice the Volume number of the System Rese * ("System Reserved") volume and the Driver Letter of the OS Volume. **

* The "System Rese" volume contains the Boot Manager and the Boot Configuration Data, it has the smallest size (e.g. 100MB, 350MB) of all volumes and if you use an UEFI based computer then the "System Reserved" is in Fat32 format (aka "EFI" volume).
** The OS volume is the partition where the Windows are installed and commonly is the largest volume in size (GB).

e.g. In this example:

The volume number of the "System Rese" volume is "2"

The drive letter of the OS volume is "D".

b. Select the "System Rese" volume by typing this command:

select volume 2

* Note: Replace the number "2", according to your case.

c. Then give these commands:

assign letter=Z

exit

d. Finally type this command:

bcdboot D:\windows /s Z: /f ALL

* Note: Replace the letter "D", according to the drive letter of the OS volume in your case.

e. Restart your computer and try to boot in Windows normally. If Windows doesn't boot, then follow the same steps, but replace the last command (bcdboot D:\windows /s Z: /f ALL) with the following command:

bcdboot D:\windows /s Z: /f UEFI

That's it! Let me know if this guide has helped you by leaving your comment about your experience. Please like and share this guide to help others.

If this article was useful for you, please consider supporting us by making a donation. Even $1 can a make a huge difference for us in our effort to continue to help others while keeping this site free:

If you want to stay constantly protected from malware threats, existing and future ones, we recommend that you install Malwarebytes Anti-Malware PRO by clicking below (we
do earn a commision from sales generated from this link, but at no additional cost to you. We have experience with this software and we recommend it because it is helpful and useful):